Good news: no need to save manually – Robin does it for you!
This article explains how saving changes works within a search.

Whenever you make a change to your search – whether it's adding, removing, or updating a filter – Robin saves it automatically and instantly.

You don’t need to press a button or worry about losing anything. All changes are saved as you go.

You can leave the search anytime. When you return later, everything will be exactly how you left it.